CN202700238U

CN202700238U - Dedusting economizer

Info

Publication number: CN202700238U
Application number: CN 201220233077
Authority: CN
Inventors: 张德强; 李继高; 刁军; 朱龙; 邓宝权; 张璋; 于庆江
Original assignee: Jiangsu Chunlv Grain & Oil Co Ltd
Current assignee: JIANGSU TIANZHIXIANG FOOD CO., LTD.
Priority date: 2012-05-23
Filing date: 2012-05-23
Publication date: 2013-01-30
Anticipated expiration: 2022-05-23

Abstract

The utility model discloses a dedusting economizer and belongs to the field of boiler flue gas dust removal technology. The dedusting economizer comprises a setting chamber which comprises an outer wall, an air inlet pipe and a valve. The outer wall of the setting chamber is in hollow double-layer structure. A boiler burns rice hulls and generates flue gas blended with rice hull ash, and the flue gas blended with rice hull ash enters the setting chamber. Due to decrease of flow rate of the flue gas, the rice hull ash accumulates at the bottom of the setting chamber. Dry rice hull ash is exhausted from the valve at the bottom of the setting chamber. Since the flue gas enters the setting chamber at a pretty high temperature, boiler water is injected into the hollow outer wall, and therefore water supply temperature of the boiler is increased, and usage amount of fuel is reduced. As the further improvement, the air inlet pipe intersects the outer wall of the setting chamber along the tangential direction of the outer wall of the setting chamber so as to enable the flue gas blended with the rice hull ash to generate cyclone separation effect in the setting chamber, and therefore the rice hull ash in the flue gas can be fully subsided. The valve at the bottom of the setting chamber is a self-weight sealing valve and can automatically remove ash.

Description

Dust removal economizer

Technical field

The utility model belongs to boiler smoke dedusting technology field, relates in particular to a kind of dust removing device for flue gas of boiler take biomaterial as fuel.

Background technology

Because the price of coal is more and more higher, increase production cost to enterprise, many enterprises replace fire coal at the new fuel of searching, rice husk has inflammable, inexpensive advantage, can be used as high-grade fuel becomes the substitute of coal, yet boiler is when acting as a fuel use with rice husk, be mingled with a large amount of rice hull ash in the boiler smoke, increased pressure to dust pelletizing system, on the one hand, a large amount of rice hull ash is larger to the dust pelletizing system wear and tear in machines, and smoke dust discharge concentration exceeds standard, and it is hygrometric state that water film dedusting is processed the rice hull ash of getting off, and has no value for use, as garbage disposal, and the dry state rice hull ash can be sold; On the other hand, cleaning hygrometric state rice hull ash workload is large, labor intensive; These unfavorable factors have all restricted the use of rice husk.

The utility model content

For above-mentioned technical problem, the utility model provides a kind of dust removal economizer that can remove rice hull ash in the flue gas and hot water can be provided for boiler.

For solving the problems of the technologies described above, the utility model is achieved by the following technical programs:

A kind of dust removal economizer comprises expansion chamber, and described expansion chamber comprises outer wall, blast pipe and valve, and described expansion chamber outer wall is the double-decker of hollow.

The flue gas that boiler combustion produces is mingled with rice hull ash and enters in the expansion chamber, because the reduction of flue gas flow rate, rice hull ash is piled up in the expansion chamber bottom, valve by expansion chamber bottom is discharged the dry state rice hull ash, injects boiler feed water in external jacket, because that the flue gas that boiler combustion produces enters the sedimentation indoor temperature is very high, water can obtain heat in the expansion chamber external jacket, the temperature of water gets a promotion, thereby improves the supply water temperature of boiler, has reduced the use amount of fuel.

As further improvement of the utility model, described blast pipe intersects along tangential direction and the described expansion chamber outer wall of described expansion chamber outer wall, the flue gas that is mingled with rice hull ash produces the effect of cyclonic separation in expansion chamber, make that rice hull ash obtains sufficient sedimentation in the flue gas; The valve of expansion chamber bottom can carry out ash discharge automatically for the deadweight draught excluder.

Description of drawings

Accompanying drawing 1 is the utility model dust removal economizer structural representation.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is made and to be further specified.

As shown in Figure 1, the utility model dust removal economizer comprises expansion chamber 1, and described expansion chamber 1 comprises outer wall 3, blast pipe 2 and valve 4, and described expansion chamber outer wall 3 is the double-decker of hollow.

The outer wall 3 of dust removal economizer expansion chamber 1 is the double-decker of hollow, the bottom mounted valve 4 of expansion chamber 1, during the boiler combustion rice husk, the flue gas that produces is mingled with rice hull ash and enters in the expansion chamber 1 by blast pipe 2, because expansion chamber 1 volumetric ratio blast pipe 2 volumes are large, the while flue gas is subject to outlet conduit 5 in expansion chamber stops, flue gas flow rate is obviously reduced, rice hull ash is piled up in expansion chamber 1 bottom owing to action of gravitation, valve 4 by expansion chamber 1 bottom is discharged the dry state rice hull ash, in the outer wall 3 of hollow, inject boiler feed water, temperature is very high when entering expansion chamber owing to the flue gas that is mingled with rice hull ash, and water can obtain heat in outer wall 3, improves the temperature of water, thereby improve the supply water temperature of boiler, reduced the use amount of fuel.

For further improving the utility model to the effect of settling of rice hull ash in the flue gas, blast pipe 2 intersects along tangential direction and the described expansion chamber outer wall 3 of described expansion chamber outer wall 3, the flue gas that is mingled with rice hull ash, the effect of generation cyclonic separation makes the rice hull ash in the flue gas obtain abundant sedimentation in expansion chamber; The valve 4 of expansion chamber bottom is the deadweight draught excluder, and the rice hull ash of piling up when expansion chamber 1 bottom is during to constant weight, and the deadweight draught excluder can automatically be opened and carry out ash discharge.

For convenience of explanation, the present invention only narrates as an example of rice husk example, in using other boiler such as bio-fuels such as maize straw, straw, straws, and the identical beneficial effect of the same generation of the utility model dust removal economizer.

The description of above embodiment is comparatively concrete, detailed; but can not therefore be interpreted as the restriction to this patent scope; should be noted that; for the person of ordinary skill of the art; without departing from the inventive concept of the premise; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. a dust removal economizer comprises expansion chamber, and described expansion chamber comprises outer wall, blast pipe and valve, it is characterized in that: described expansion chamber outer wall is the double-decker of hollow.

2. dust removal economizer according to claim 1 is characterized in that: described blast pipe intersects along tangential direction and the described expansion chamber outer wall of described expansion chamber outer wall.

3. dust removal economizer according to claim 1 and 2 is characterized in that: described valve is the deadweight draught excluder.